21231422413213 has 8 divisors (see below), whose sum is σ = 21634155288576. Its totient is φ = 20828768797200.

The previous prime is 21231422413189. The next prime is 21231422413219. The reversal of 21231422413213 is 31231422413212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21231422413213 - 2²⁵ = 21231388858781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231422413219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19273873 + ... + 20345638.

It is an arithmetic number, because the mean of its divisors is an integer number (2704269411072).

Almost surely, 2^{21231422413213} is an apocalyptic number.

It is an amenable number.

21231422413213 is a deficient number, since it is larger than the sum of its proper divisors (402732875363).

21231422413213 is a wasteful number, since it uses less digits than its factorization.

21231422413213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39629675.

The product of its digits is 13824, while the sum is 31.

Adding to 21231422413213 its reverse (31231422413212), we get a palindrome (52462844826425).

Subtracting 21231422413213 from its reverse (31231422413212), we obtain a palindrome (9999999999999).

The spelling of 21231422413213 in words is "twenty-one trillion, two hundred thirty-one billion, four hundred twenty-two million, four hundred thirteen thousand, two hundred thirteen".